Drouin will continue to be evaluated by the club's medical staff.
The 26-year-old from Sainte-Agathe-des-Monts, Que., is third on the team in scoring with 20 points, six goals and 14 assists, in 32 games this season.
Also, forwards Joel Armia and Cole Caufield continue to train in Wisconsin after testing positive for COVID-19 during the team's road trip through the U.S. earlier this month. Both must wait until Friday before they're allowed to cross the border to re-enter Canada.
The Canadiens are last in the league with an 8-26-7 record and next play host to the Anaheim Ducks on Thursday.